Duralex - Lys Square Stackable Bowl with White Lid, Set of 3 Sizes Set includes 3 different sizes: 17 cm, 20 cm, and 23 cm, Duralex,shock resistant tempered glass, is 2.5 times more resistant to breakage and chipping than normal glass, Can also withstand sudden thermal shock, from -4 F to 212 F Duralex glass is very hygienic. It is non-porous and does not absorb liquids, colors or flavors Dishwasher, refrigerator and microwave safe. Products maintain the original look for years. Made in France.